316 Stainless Steel Seamless Pipe

316 Stainless Steel Seamless Pipe is a high-quality tubing made primarily from the elements of iron, chromium, nickel and molybdenum, is an ideal choice for superior performance and a wide range of applications. The addition of molybdenum significantly enhances corrosion resistance, especially in chlorinated and acidic environments.

316 SS Pipe Form

  • Round;
  • Square;
  • Rectangle;
  • or as required

Product Description

316 stainless steel is an austenitic stainless steel containing 16-18% chromium, 10-14% nickel and 2-3% molybdenum. The addition of molybdenum significantly improves corrosion resistance, especially in chlorinated and acidic environments. Compared to grade 304, 316 has greater corrosion resistance in chlorinated and acidic media, and is suitable for corrosive environments.

316 Stainless Steel Seamless Pipe is hot rolled from solid billets and is not welded.This no-seams design eliminates weak points and provides consistent mechanical strength and higher pressure ratings. Seamless pipes offer the highest strength, pressure capacity and corrosion resistance, and are well suited for use in critical industries such as oil and gas, chemical, and power.

316 Stainless Steel Seamless Pipe Features

1. Superior Corrosion Resistance
The addition of molybdenum can effectively prevent pitting and crevice corrosion, and can work stably for a long term in seawater, salt spray, sulfuric acid and other strong corrosive media, surpassing that of 304 stainless steel.

2. High-Temperature Strength 

316 retains excellent mechanical strength at elevated temperatures,  with better creep resistance than 304. This stability under heat makes it suitable for heat exchangers, boilers and other high-temperature system.

Maintains structural stability at elevated temperatures, making it suitable for high-temperature processes.

3. High Strength

The seamless design allows it to withstand higher pressures and mechanical stresses, ensuring greater strength and pressure resistance, reducing the risk of leakage and ensuring system safety.

4. Hygienic Aesthetics and Easy Maintenance 

The smooth surface has an attractive appearance and is easy to clean, making it suitable for food and medical industries, while the smooth interior reduces dirt accumulation and lowers maintenance costs.

316 Seamless Pipe Specifications

Standard: ASTM A312,ASTM A269,EN ISO 3651-2,etc;
Outer Diameter: 3-630 mm;
Wall thickness: 0.5-50 mm(SCH10-XXS);
Length:1-12 m,can be customized;
Surface Finish: BA/2B/NO.1/NO.3/NO.4/8K/HL/2D/1D;
Type: Seamless;
Technique: Hot Rolled/Cold Rolled;
Surface: Polishing,annealing,pickling,bright
Shape:Round.Square.Rectangle,etc

316 Pipe Production Size

Stainless Steel Round Tube Pipe

Wall thickness

0.5mm-20mm

Outer diameter

10mm-2000mm

Stainless Steel Square Tube Pipe

Wall thickness

0.5mm-20mm

Outer diameter

4mm*4mm-800mm*800mm

Stainless Steel Rectangular Tube Pipe

Wall thickness

0.5mm-20mm

Outer diameter

1mm-150mm

ss round pipe
stainles steel square tube
stainless steel tubes
316 pipe surface finish

316 Stainless Steel Material Composition

The core composition is chromium (16-18%), nickel (10-14%), molybdenum (2-3%), low carbon version 316L carbon content ≤ 0.03%.
GRADE C MN SI P S CR MO NI N
316 Min

0

16.0

2.00

10.0

Max

0.08

2.0

0.75

0.045

0.03

18.0

3.00

14.0

0.10

316 Seamless Pipe Mechanical Properties

  • Annealed condition: yield strength ≥205MPa, tensile strength ≥515MPa, elongation ≥35%.
  • Work hardened: yield strength up to 517MPa, tensile strength ≥689MPa
  • Excellent low-temperature toughness, wide high-temperature applicability (-196°C to 800°C intermittent use)
Grade UNS Specification

Minimum Yield Strength

at 0.2 % Offset ksi

Minimum Tensile Strength

ksi

Elongation
in 2 in.
(50.8mm)% min
Strain-Hardened 316/316L Stainless Steel Seamless Pipe
316/316L

S31600/

S31603

ASTM A269

ASTM A262

EN ISO 3651-2

75 100 20
Annealed 316/316L Seamless Pipe
316/316L

S31600/

S31603

ASTM A269

ASTM A262

EN ISO 3651-2

40 70 35

Physical Properties

GRADEDENSITY
(KG/M3)
ELASTIC MODULUS
(GPA)
MEAN CO-EFF OF THERMAL EXPANSION (ΜM/M/°C)THERMAL CONDUCTIVITY
(W/M.K)
SPECIFIC HEAT 0-100°C
(J/KG.K)
ELEC RESISTIVITY
(NΩ.M)
0-100°C0-315°C0-538°CAT 100°CAT 500°C
316800019315.916.217.516.321.550074

Equivalent Standard of 316 Stainless Steel

GRADE

UNS
NO

OLD BRITISH

EURONORM

SWEDISH
SS

JAPANESE
JIS

BS

EN

NO

NAME

316

S31600

316S31

58H, 58J

1.4401

X5CrNiMo17-12-2

2347

SUS 316

316 Pipe Production Process

All seamless pipes are made from certified 316 stainless steel supplied by China’s leading mills (TISCO, Baosteel). These top-tier steels have fully controlled chemistry and consistently high quality, ensuring our pipes meet stringent specifications.

  • There are three types: hot rolling, cold drawing and precision. The surface can be polished, pickled, sandblasted and other treatments.
  • Seamless pipes are strictly tested by hydraulic pressure, expansion, flattening and other tests to ensure quality
316 stainless steel tubing production process

We enforce strict dimensional control (OD, wall thickness, roundness) to ensure accuracy. Our 316 seamless pipes are available in standard sizes from ½″ to 18″ NB and wall schedules Sch5S–Sch160,with tight tolerances for critical applications. Custom lengths and special end finishes (plain, beveled, threaded) are also available.

We also cut pipes to exact lengths (standard 6m or custom sizes 5.8m, 11.8m, etc.) and offer special end machining (threading, flanges) to fit your needs.

316 SS Pipe Application

316 SS seamless pipes are widely used in critical systems in various industries. The acid and chloride resistance of 316 is crucial in chemical processes, while its durability in marine environments makes it an ideal material for offshore applications.

  • Marine engineering: In desalination projects, 316 stainless steel seamless pipe ensures long-term stable operation due to its chloride corrosion resistance.
  • Chemical industry: used to transport strong acids and alkalis, 316 stainless steel seamless pipe effectively prevent leakage and pollution.
  • Food processing: in the dairy and brewing industry, 316 stainless steel seamless pipe has become the preferred material due to its hygienic and easy-to-clean properties.

Our Customization and Export Capability

Custom Size&Fabrication

We cut pipes to exact lengths and offer special end machining (threading, flanges) to fit your needs.We can also adjust outer diameter or modify as OEM parts.

Third-Party Inspection

We carry out strict quality tests like dimensional inspection, composition test, hardness test, etc. before shipment.We also support Third-Party inspections (SGS, Bureau Veritas, TUV, etc.),our quality assurance team fully cooperates with inspectors and can provide pre-shipment reports.

Standard Export Seaworthy Package
Pipes are fitted with plastic dust caps and waterproof packaging, secured by steel straps or packed on wooden pallets to ensure safe transportation over long distances.

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